The

Internet Infrastructure HOLDRs

( IIH) ETF was one of the best performers Tuesday. Holdings

RealNetworks

(RNWK) - Get Report

,

Internap Network Services

(INAP) - Get Report

and

Navisite

(NAVI) - Get Report

were higher by 5% or more. The ETF was gaining 13 cents, or 2.4%, to $5.57.

Semiconductor-related ETFs were also gaining ground. Among individual names,

Broadcom

(BRCM)

was rising by 5.5%,

Altera

(ALTR) - Get Report

was higher by 4.9%, and

Novellus Systems

(NVLS)

was gaining 3.3%.

The

Semiconductor HOLDRs

(SMH) - Get Report

was adding 1.5% to $34.09. The

PowerShares Dynamic Semiconductors

(PSI) - Get Report

ETF was gaining 1.5% to $17.16, and the

SPDR Semiconductor

(XSD) - Get Report

was recently up 1.1% to $49.72.

On the flip side, bundled securities tracking energy were among the worst performers as oil sank below $60 a barrel.

The

iShares Dow Jones U.S. Oil & Gas Exploration Index

(IEO) - Get Report

ETF was losing 1.8% to $47.82. The

Oil Services HOLDRs

(OIH) - Get Report

ETF was lower by 1.2% to $136.32, and the

PowerShares Dynamic Energy Exploration

(PXE) - Get Report

ETF was falling by 1.2% to $18.60.

The

iShares Dow Jones U.S. Home Construction

(ITB) - Get Report

ETF was losing 2.3% after luxury-home builder

Toll Brothers

(TOL) - Get Report

cut its 2007 forecast again. Additionally,

Beazer Homes

(BZH) - Get Report

cautioned that housing market fundamentals remain difficult. The ETF was lower by 86 cents to $36.86.